厚煤层膏体分层充填开采顶板破坏特征分析

Analysis of Roof Failure Characteristics in Thick Coal Seam Paste Filling Mining

为研究厚煤层膏体分层充填开采顶板破坏特征,以龙王沟煤矿6201工作面的地质条件为工程背景,分析了厚煤层膏体分层充填开采技术,并基于等效巷道理论计算出顶板塑性区破坏高度为9.11 m,利用FLAC3D数值仿真软件,建立了厚煤层膏体分层充填开采的流-固耦合数值模型,得出第4分层开采完毕后顶板的最大塑性破坏高度为11.5 m,最终利用顶板位移监测系统测得顶板最大破坏高度约为12 m,与理论计算、数值模拟所得结果基本吻合。

In order to study the roof failure characteristics of thick coal seam paste filling mining, the geological conditions of the 6201 working face of Longwanggou coal mine are taken as the engineering background, analyzes the thick coal seam paste backfill mining technology, and based on the roadway theory, the failure height of the roof is 9.11 m, by using FLAC3D numerical simulation software, a numerical model of fluid solid coupling for paste backfill mining in thick coal seam is established. The maximum plastic failure height of roof is 11.5 m. Using the roof displacement monitoring system, the maximum failure height of the roof is measured to be about 12 m, which is basically consistent with the theoretical calculation and numerical simulation results.